Next Article in Journal
Sulphate Removal from Flotation Process Water Using Ion-Exchange Resin Column System
Next Article in Special Issue
Removal of Pollutants from an AMD from a Coal Mine by Neutralization/Precipitation Followed by “In Vivo” Biosorption Step with the Microalgae Scenedesmus sp.
Previous Article in Journal
Efficiency of Chemical and Biological Leaching of Copper Slag for the Recovery of Metals and Valorisation of the Leach Residue as Raw Material in Cement Production
Previous Article in Special Issue
The Evolution of Pollutant Concentrations in a River Severely Affected by Acid Mine Drainage: Río Tinto (SW Spain)
Open AccessFeature PaperArticle

Numerical Modeling of a Laboratory-Scale Waste Rock Pile Featuring an Engineered Cover System

1
Department of Earth, Ocean, and Atmospheric Sciences, 2207 Main Mall., Vancouver, BC V6T 1Z4, Canada
2
Institut de Recherche en Mines et en Environnement, Université du Québec en Abitibi-Témiscamingue, 445 Boulevard de l’Université, Rouyn-Noranda, QC J9X 5E4, Canada
*
Author to whom correspondence should be addressed.
Now at: MINES ParisTech, PSL University, Centre de Geosciences, 35 rue St Honore, 77330 Fontainebleau, France.
Minerals 2020, 10(8), 652; https://doi.org/10.3390/min10080652
Received: 21 May 2020 / Revised: 11 July 2020 / Accepted: 15 July 2020 / Published: 23 July 2020
(This article belongs to the Special Issue Pollutants in Acid Mine Drainage)
Improved design to reduce contaminant mass loadings from waste rock piles is an increasingly important consideration. In certain cases, an engineered cover system containing a flow control layer (FCL) may be used to mitigate the release of metals out of a pile using capillary barrier effects (CBEs), diverting water away from reactive materials below. In this study, a reactive transport model was calibrated to observational data from a laboratory experiment designed to evaluate a cover system. The results show that the numerical model is capable of capturing flow rates out of multiple drainage ports and matching key effluent concentrations by including the spatial distribution of hydraulic parameters and mineral weathering rates. Simulations were also useful for characterizing the internal flow pathways within the laboratory experiment, showing the effectiveness of the cover in diverting the flow away from the reactive waste rock and identifying secondary CBEs between different rock types. The numerical model proved beneficial in building an improved understanding of the processes controlling the metal release and conceptualizing the system. The model was expanded to investigate the robustness of the cover system as a function of the applied infiltration rate, supporting that water diversion will occur with infiltration rates representative of field conditions. View Full-Text
Keywords: reactive transport modeling; waste rock; engineered cover system; capillary barrier effects; contaminated neutral drainage; heterogeneity reactive transport modeling; waste rock; engineered cover system; capillary barrier effects; contaminated neutral drainage; heterogeneity
Show Figures

Figure 1

MDPI and ACS Style

Raymond, K.E.; Seigneur, N.; Su, D.; Poaty, B.; Plante, B.; Bussière, B.; Mayer, K.U. Numerical Modeling of a Laboratory-Scale Waste Rock Pile Featuring an Engineered Cover System. Minerals 2020, 10, 652. https://doi.org/10.3390/min10080652

AMA Style

Raymond KE, Seigneur N, Su D, Poaty B, Plante B, Bussière B, Mayer KU. Numerical Modeling of a Laboratory-Scale Waste Rock Pile Featuring an Engineered Cover System. Minerals. 2020; 10(8):652. https://doi.org/10.3390/min10080652

Chicago/Turabian Style

Raymond, Katherine E.; Seigneur, Nicolas; Su, Danyang; Poaty, Bissé; Plante, Benoît; Bussière, Bruno; Mayer, K. U. 2020. "Numerical Modeling of a Laboratory-Scale Waste Rock Pile Featuring an Engineered Cover System" Minerals 10, no. 8: 652. https://doi.org/10.3390/min10080652

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop